/*

 * Copyright (c) 2002, 2015, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

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#ifndef SHARE_VM_GC_SHARED_GENERATIONCOUNTERS_HPP

#define SHARE_VM_GC_SHARED_GENERATIONCOUNTERS_HPP

#include "memory/virtualspace.hpp"

#include "runtime/perfData.hpp"

// A GenerationCounter is a holder class for performance counters

// that track a generation

class GenerationCounters: public CHeapObj<mtGC> {

  friend class VMStructs;

private:

  void initialize(const char* name, int ordinal, int spaces,

                  size_t min_capacity, size_t max_capacity,

                  size_t curr_capacity);

 protected:

  PerfVariable*      _current_size;

  VirtualSpace*      _virtual_space;

  // Constant PerfData types don't need to retain a reference.

  // However, it's a good idea to document them here.

  // PerfStringConstant*     _name;

  // PerfConstant*           _min_size;

  // PerfConstant*           _max_size;

  // PerfConstant*           _spaces;

  char*              _name_space;

  // This constructor is only meant for use with the PSGenerationCounters

  // constructor. The need for such an constructor should be eliminated

  // when VirtualSpace and PSVirtualSpace are unified.

  GenerationCounters()

             : _name_space(NULL), _current_size(NULL), _virtual_space(NULL) {}

  // This constructor is used for subclasses that do not have a space

  // associated with them (e.g, in G1).

  GenerationCounters(const char* name, int ordinal, int spaces,

                     size_t min_capacity, size_t max_capacity,

                     size_t curr_capacity);

 public:

  GenerationCounters(const char* name, int ordinal, int spaces,

                     size_t min_capacity, size_t max_capacity, VirtualSpace* v);

  ~GenerationCounters();

  virtual void update_all();

  const char* name_space() const        { return _name_space; }

};

#endif // SHARE_VM_GC_SHARED_GENERATIONCOUNTERS_HPP